Air brush



Nov. 25, 1924.

W. C. BEACH AIR BRUSH Filed June 16, 19.22

2 Sheets-Sheet l Nov, 25, 1924.

W. C. BEACH AIR BRUSH Filed June 1e, 1922 J Il Patented Nov. 25, 1924.

WILLARD C. BEACH, 0F NEWARK, NEW JERSEY.

AIR BRUSH.

Application led June'16, 1922. Serial No. 568,686.

To all whom it may concern.'-

Be it known that I, VVILLARD C. BEACH, a citizen of the United States, residing at Newark, in the lcounty of Essex and State of New Jersey, have invented new and useful improvements in Air Brushes, of which the following is a specification. y

This invention has as one of its objects to provide a spray head in which only a small quantity of material is received and inti.

mately mixed with the air current, provisions being made for adjustably controlling the inlet of material in accordance with requirements.

Another purpose is in the provision of an improved, partially concealed trigger arranged with view to convenience of oper ation and which actuates the air and material valves in immediate sequence.

A further aim is to provide an implement,

essentially light and strong and adapted for long continued service.

These, and other objects, which will appear as the description proceeds, are attained by the novel design, construction and combination of arts hereinafter described, and shown in t ieaccompanying drawings, forming a material part of this disclosure, and in which y f Figure 1 is a longitudinal sectional view of an embodiment of the inventitm completely assembled, parts showing in side elevation.

Figure 2 is a top plan view of the same.

Figure 3 thereof.

Figure 4 is an enlarged partial rear view.

Figure 5 is a transverse sectional view taken on line 5-5 of Figure 1.

Figure 6 is a similar sectional view on line 6 6 of Figure 1 looking to the front.

Figure 7 is another sectional view taken on the saine linelooking to the rear.

Figure V8 is a transverse sectional view taken on line 8-8 of Figure 1.

Fi 1re 9 is an enlarged fragmentary sectiona view, similar to Figure 1, but showing they parts in different adjustment.

The air brush as shown in the drawings is made of a pattern representing the automatic revolver type, comprised of a body generally designated by the numeral 15 integral with its handle 16, the latter containing a number of transverse openings 17, 18 and 19 to reduce weight, the latter opening 19 extending into the body 15.

These openings are normally covered with is a front elevational `view plates 2O held by through bolts 21 which serve asv dowels as well as securing elements.

In the lower part of' the handle is a. centrallongitudinal rib 22 having a projection 23 below the handle terminating in a, screw-threaded nipple`24 to which may be engaged the hose from a compressed air supply.

An opening 25 is drilled axially through the nipple and extends into the rib 22 cornmunlcating with a reduced opening 26 leading to the valve chamber 2,7 in which operates a spherical. headed valve 28 pressed against its seat by a coiled compression spring 29 backed by a plug 30 screw-threaded into the rear edge 'of the handle and forming the outer element ot the valve chamber.

This plug is bored, as at 31, to'receive and guide the stem 32 of the valve, which is also provided with a front stem 33, reduced 1n diameter near its junction with the head of the'valve providin an` annular air space 34 in the bore` throng which the tip of the stem 33 extends.

Atrigger 35 is pivoted in a longitudinal slot in the front ed e of the handle on a screw 36, this trigger eing normally pressed outwardly by a coiled compression spring 37 untilthe inner end of the trigger abuts a fixed stop 38 formed with the rib 22, the spring 37 abutting a similar stop 39 further up on the rib.

Said trigger is outwardly formed with finger grips 40 and 41 terminating in a guard 42 and is adapted, when pressed in,- wardly, to make Contact with the tip of the stem 33 thereby opening the air passage and admitting air to the recess 34.

At the top of the circular body 15 is a central narrow projection 43 having an opening 44 by which the apparatus may be suspended andl axially 'of the body is a bored opening 45 suited to slidably receive a plunger 46.

The opening 45 is enlarged at the rear, as at 47, to contain a coiled compression spring 48 and is internally screw-threaded at its outer end to receive a hollow plug 49, said plug being bored to slidably receive a sleeve nut 50 threaded to the reduced end 51 of the plunger 46.

The outer end of the plunger extension 5l and sleeve 50 may make contact with the head of a plug 52 positioned in the opening of the plug 49 and secured to it by a pin 53,

vthe outer end of the plug stem being fixed in a keyed bushing 54 secured in a cap 55,

covering the rear end of the body 15 and provided with a corrugated sleeve portion 56 neatly fitting around the end of the body, the arrangement' being such as to prov1de manual adjustment for` the plug 52, thus limiting the movement that can be given the plunger 46.

Motion is communicated to the plunger 46 by an arm 57 bored to fit the extension 51 and normally pressed outwardly by the spring 48, said arm having an angular extension 58 guided by a slotted post 59 fixed in the upper end of the handle, and projecting into position to be actuated by the inner surface of thev trigger- 35.

It is to be noted't-h'at the trigger will first open the air valve and then contact with the sliding arm 57-458 to operate the plunger, for a'reason further on apparent.

'The rontend of the body 15 is also axially counterbored and internally screwthreaded tp receive theplug 60 of the barrel 61 projecting outwardly in front ofthe jbody.

Said barrel has an axial bore 62 alining with the bore 45 and contains at its rear an annular recess 63, concentric thereto but non-communicating, a cylindrical plug 64 close fitted to the recess acting as a stopper.

The outer end of the bore 62 is counterbored to `storm another annular recess 65 and is also internally screw-threaded at its outer` end to receive a plug 66having an axial passage 67 enterable through a coincal valve seat controlled by the conical valve 68 formed on the end of the plunger 46. Also engaged in the opening at the outer end of the barrel 61 ,is a conical plug 69, having a central passage 70 in register with the opening 67, this pl'ug having a shoulderv firmly screwed against the end ot the barrel 61.

The-exterior of the barrel is also screwthreaded and has tted to it a conical cap 71, its cylindrical', rear portion being knurled and seated against a shoulder 72 on the barvrel in such manner as to provide aconical space 73 between the inner surface of the cap and exterior of the cone 69, a registering opening 74 being formed through the tip of the cap to communicate with the space 73and passage 70.

Formed on the lower side o'f the barrel 61 is a screw-threaded nipple 7 5 to Vwhich may be attached a flexible hose communicating with a supply ot the material to'be dispensed, as paint in a duid condition, the nipple having an opening 76 enteringthe annular recess 65 as shown in Fig. 1.

Drilled at an angle from a point at one side of the body 15 and rearwardly to interpt the space 34 in front ol the air valve 28, is a passage 77 provided with a plug stopper 78 at its upper end and intercepting this passage, at about the center of the b ody 15 but toone side, is an openlng 7 9 continuing through the plug 64 into the annular.

space 63.

Leading from this space are one or more passages extending longitudinally through the barrel 61, at the side of its axial bore, intothe conical space 73.y

ln operation, the nipples 24 and 75 having been connected to supply sources of air and paint respectively, the apparatus is ready for use. f

Upon grasping the handle 16, the fingers will naturally engage the trigger, pressing the same inwardly, this action first opening the air valve 28, allowing a current of air to flow through the opening 25 past the valve 28, passages 77, 79 into the recess 63 and thence through the openings 80 into the conical space 73 and out Aat the tip opening 74.

This action caulses a suction in the opening v 70, in the manner of an injector, and if the trigger be further pressed into the handle it will contact with the Varm 58-57, opposing the spring 48 and retract the plunger, allowing paint toienter the space 65 and be drawn outwardly past the valve 68, through the openings 67 and 70 to meet the air blast and "be delivered as directed by the opera-tor in the form of a spray.l

lf a relatively largequantity of paint is required the cap 55 is rotated to move the plug 52 outward, thus permitting a larger degree of opening at the valve 68, and upon releasin the trigger-35 it will be obvious that bot the air and paint valves will beat once "closed by the pressure of their respective springs.` y

The foregoing-disclosure is to be regarded as descriptive and illustrative only, and not as restrictive or limitative of the invention,

l of which obviously an embodiment l,may be constructed including many ymodifications without departing rom the general scope herein indicated and denoted in the'appended claims.

Having thus described my invention, what li claim as new and desire to secure by Letters Patent, is

1. An air brush comp-rising a unitary frame consisting.- of a handle and a body, said handle having an air inlet, a valve controlling the passage ol air therein, a barrel fixed in said body and having a discharge nozzle near its outer end, a material inlet communicating with said nozzle, an air duct leading from said valve to said nozzle, a plunger slidable in said barrel adapted to' close the material passage to Said nozzle, an adjustable cap on `the opposite end of said body, means in said cap to limit the outward movement of said plungera trigger pivote/d in said handle adapted to open said air valve, and an l.. shaped slide contained wholly within said frame and actuated by said trigger for retracting said plunger subsequent to opening said valve.

2. An air brush comprising a barrel and a body having an integral handle provided with an air inlet, a valve therefor, a conical spray head fixed on one end of sa-id barrel, there being a concentric space between, one or more ducts leading from said-air valve to the mentioned sp-ace, a materia-l inlet to said barrel, a plunger' controlling the entrance of material to said head, a spring normally pressing said plunger forward, means for adjusting the maximum movement of said plunger rearwardly, a trigger pivoted in said handle adapted to open said air valve and a right angled element slidable in said handle and having a part loosely engaging said plunger, a sleeve nut on the plunger for clamping said element to the plunger anda cap on the end of said body enclosing the bore thereof.

3. An air brush comprising a body, a handle integral therewith having an annular air space, a barrel extending from said body,

said body and handle having an alined bore,

a yplunger operable in the mentioned bore, a conical plug fixed at the outer end of said barrel, a valve in said plug controlled by said plunger, a material inlet to said barrel, a conical nozzle spacedly surrounding said plug, a trigger pivoted near its lower end in said handle, finger grips formed on the outer face of said handle, a spring for normally pressing said trigger outward y, means for limitingvthe movement of said trigger, an air inlet valve horizontally disposed in said handle and adapted to be opened by the operation of said trigger for admitting airto the annular air spacev'in said handle, said space communicating with the space between nozzle and plug, and a sliding arm controlled by said trigger for operating said plunger to operate the valve in said plug for delivery of a spray of paint through said nozzle.

4. An air brush comprising a body having a handle portion, a material inlet adjacent the outer end of said body, an air inlet at the bottom of said handle, means for maintaining said inlets normally closed, a single means in said handle for opening both of said inlets, said means being wholly enclosed, and means for adjusting the material inlet.

5. An air brush comprising a handled body, a material inlet thereon, an air inlet .in the handle portionfof said body, a valve for each of said inlets, a nozzle for discharging commingled air and material, means for manually controlling the area of said material inlet, and a single means wholly concealed in said handle for progressively opening said air and material valves.

G. In combination with an air brush havinga handled `body, inlets for air and material respectively and valves controlling the inlets,'of afplunger formed with the material inlet valve, a spring'impelled sliding arm on said plunger, a revoluble cap on said body, means carried by said cap for adjusting the travel of said plunger, and a trigger in the lower l rtion of the'handle of said body adapte to actuate both of said valves.

lThis specification signed and witnessed this lth day of June, 1922.

y WILLARD c. BEACH.

v WVitnesses:

FREDK C. Flscm, F. NoLL. v 

